碳钢和低合金钢手工电弧焊用涂药焊条 — 识别符号代码

ISO 2560-1973 (E)

there is less risk of underbead cracking when welding steels likely to show a marked hardening in the heat-affected zone. To be included in this group, the covering of the electrodes shall in general not have a higher water content than 0,6 %. The water content can be established according to the method described in Document IIS/IIW 314-681), Recommended procedure for the determination of total water contents of electrode coatings by combustion (potential hydrogen contents). C — The covering of electrodes of the cellulosic type contains a large quantity of combustible organic substances, so that the decomposition of the latter in the arc produces a voluminous gas shield. The amount of slag produced is small and the slag is easily detached. This type of electrode is characterized by a highly penetrating arc and fairly high fusion rate. Spatter losses are fairly large and the weld surface is somewhat coarse, with unevenly spaced ripples. These electrodes are usually suitable for welding in all positions. O — Electrodes of the oxidizing type have a thick covering composed mainly of iron oxides with or without manganese oxides. The covering gives an oxidizing slag, so that the weld metal contains only small amounts of carbon and manganese. The slag is heavy, compact and often self-detaching. This type of electrode gives a poor penetration and a fluid molten pool, and is particularly suitable when only a small weld is required. Usually its use is restricted to welding in the horizontal/vertical fillet weld and flat fillet weld positions. These electrodes are used mainly for welding steels when the appearance of the weld is more important than the mechanical strength of the joint. R and RR — Rutile type electrodes have a covering containing a large quantity of rutile or components derived from titanium oxide. Usually this amounts to 50 % by mass (not taking into account cellulosic material). The R type can be distinguished from the AR type by its heavier slag. Sometimes this difference is not readily discernible, especially with electrodes having a medium covering, but the amount of rutile in the covering is well above 45 %. Because of the difference in application and also mechanical properties, a subdivision is made according to the thickness of the covering.

R — The covering is of medium thickness2). Small amounts of cellulosic material, up to a maximum of 15 %, may be present in the covering. These electrodes are particularly suitable for welding in the vertical and overhead positions. RR — The covering is of heavy thickness2). Small amounts of cellulosic material, up to a maximum of 5 %, are sometimes present in the covering. The slag is heavy, compact and usually self-detaching. The appearance of the weld resembles that of an O-type electrode. Although the susceptibility to hot cracking in relation to the parent metal is not so high as that of the acid type, care must be taken in view of the fact that usually a weld is made with a much smaller throat thickness than with acid electrodes. The maximum current to be used is lower than that of an AR-type, because of a lower melting rate. S — The symbol S is reserved for the designation of the other types of electrodes and it is understood that these correspond to coverings other than those specified under A, AR, B, C, O, R and RR. In particular, electrodes with coverings containing iron powder or other materials which would not affect the characteristics specified for the types of covering defined above, shall be classified under the said types and not in type S. If, in national standards, it is necessary to incorporate certain other types of covering, the symbols A, B, C, O and R can be supplemented by a second symbol in brackets to indicate the type. 4.4.2 The efficiency is symbolized by a figure determined according to the method described in ISO 2401. In this code, only the nominal electrode efficiency is taken into consideration. Symbols to be used : 1) The figure found using the above-mentioned method is rounded off to the nearest multiple of 10, values ending with 5 being rounded off to the higher multiple of 10. As an example, efficiencies rounded off in accordance with this rule are ... 90 — 100 — 110 — 120 — 130 — 140 ... etc. 2) No symbol is used for efficiencies less than 110, which implies an experimental nominal efficiency < 105 %3).

1) Published in the International Institute of Welding journal, Welding in the World, Vol. 7, No. 1, 1969.

2) The limit between coverings of medium and heavy thickness corresponds approximately to a ratio of 1,5 between the outer diameter of the covering and the core wire diameter.

3) The combined application of provisions 1 and 2 gives the following grading system :

Experimentally determined efficiency < 105 % : no symbol.

Experimentally determined efficiency > 105 < 115 % : symbol 110.

Experimentally determined efficiency > 115 < 125 % : symbol 120.

Experimentally determined efficiency > 125 < 135 % : symbol 130.

etc.

6

Révision de la présente publication

Le contenu technique des publications de la CEI est constamment revu par la Commission afin d'assurer qu'il reflète bien l'état actuel de la technique.

Les renseignements relatifs à ce travail de révision, à l'établissement des éditions révisées et aux mises à jour peuvent être obtenus auprès des Comités nationaux de la CEI et en consultant les documents ci-dessous :

• Bulletin de la CEI
• Annuaire de la CEI
• Catalogue des publications de la CEI

Publié annuellement

Terminologie

En ce qui concerne la terminologie générale, le lecteur se reportera à la Publication 50 de la CEI : Vocabulaire Electrotechnique International (VEI), qui est établie sous forme de chapitres séparés traitant chacun d'un sujet défini, l'Index général étant publié séparément. Des détails complets sur le VEI peuvent être obtenus sur demande.

Les termes et définitions figurant dans la présente publication ont été soit repris du VEI, soit spécifiquement approuvés aux fins de cette publication.

Symboles graphiques et littéraux

Pour les symboles graphiques, symboles littéraux et signes d'usage général approuvés par la CEI, le lecteur consultera :

• la Publication 27 de la CEI : Symboles littéraux à utiliser en électrotechnique ;
• la Publication 617 de la CEI : Symboles graphiques pour schémas.

Les symboles et signes contenus dans la présente publication ont été soit repris des Publications 27 ou 617 de la CEI, soit spécifiquement approuvés aux fins de cette publication.

Publications de la CEI établies par le même Comité d'Etudes

L'attention du lecteur est attirée sur la page 3 de la couverture, qui énumère les publications de la CEI préparées par le Comité d'Etudes qui a établi la présente publication.

Revision of this publication

The technical content of IEC publications is kept under constant review by the IEC, thus ensuring that the content reflects current technology.

Information on the work of revision, the issue of revised editions and amendment sheets may be obtained from IEC National Committees and from the following IEC sources :

• IEC Bulletin
• IEC Yearbook
• Catalogue of IEC Publications

Published yearly

Terminology

For general terminology, readers are referred to IEC Publication 50 : International Electrotechnical Vocabulary (IEV), which is issued in the form of separate chapters each dealing with a specific field, the General Index being published as a separate booklet. Full details of the IEV will be supplied on request.

The terms and definitions contained in the present publication have either been taken from the IEV or have been specifically approved for the purpose of this publication.

Graphical and letter symbols

For graphical symbols, and letter symbols and signs approved by the IEC for general use, readers are referred to :

• IEC Publication 27 : Letter symbols to be used in electrical technology ;
• IEC Publication 617 : Graphical symbols for diagrams.

The symbols and signs contained in the present publication have either been taken from IEC Publications 27 or 617, or have been specifically approved for the purpose of this publication.

IEC publications prepared by the same Technical Committee

The attention of readers is drawn to the inside of the back cover, which lists IEC publications issued by the Technical Committee which has prepared the present publication.

2

NORME INTERNATIONALE INTERNATIONAL STANDARD МЕЖДУНАРОДНЫЙ СТАНДАРТ

NORME INTERNATIONALE INTERNATIONAL STANDARD МЕЖДУНАРОДНЫЙ СТАНДАРТ

CEI IEC 50(426) Première édition First edition 1990-10 Vocabulaire Electrotechnique International Chapitre 426 : Matériel électrique pour atmosphères explosives International Electrotechnical Vocabulary Chapter 426 : Electrical apparatus for explosive atmospheres Международный Электротехнический Словарь Глава 426 : Электрооборудование для взрывоопасных сред © CEI 1990 Droits de reproduction réservés - Copyright - all rights reserved - Право издания охраняется законом Aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Запрещается Без письменного разрешения издателя воспроизведение или копирование этой публикации или ее части в любой форме или любыми средствами — электронными или механическими, включая фотоконю и микрофильм. Bureau central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève Suisse Commission Electrotechnique Internationale International Electrotechnical Commission Международная Электротехническая Комиссия Code prix Price code Код цены S Pour prix, voir catalogue en vigueur For price, see current catalogue Цена указана в действующем каталоге 3

50(715) © IEC:1996

CONTENTS

FOREWORD	VII
PREFACE	VII
Sections
715-01	Basic terms	1
715-02	Resources	10
715-03	Calls	17
715-04	Times and delays	22
715-05	Traffic	24
715-06	Circuit groups	32
715-07	Traffic engineering	34
715-08	Networks	41
715-09	Circuit switched networks	46
715-10	Message switched networks	51
715-11	Packet switched networks	52
Index	53

:current

Foreword

This document (EN 10216-3:2002) has been prepared by Technical Committee EC/TC 29, "Steel tubes and fittings for steel tubes", the secretariat of which is held by UNI.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest by November 2002.

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

Other Parts of EN 10216 are:

Part 1:	Non-alloy steel tubes with specified room temperature properties
Part 2:	Non-alloy and alloy steel tubes with specified elevated temperature properties
Part 4:	Non-alloy and alloy steel tubes with specified low temperature properties
Part 5:	Stainless steel tubes

Another European Standard series covering tubes for pressure purposes is:

EN 10217:

Welded steel tubes for pressure purposes

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

5

1 Scope

This Part of EN 10216 specifies the technical delivery conditions in two test categories for seamless tubes of circular cross section, made of weldable alloyed fine grained steel.

2 Normative references

This European Standard incorporates by date or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For date references, subsequent amendments to or revisions of, any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).

The requirements of this European Standard rule when they differ from those in the standards and documents referred to below:

EN 10002-1, Metallic materials - Tensile testing - Part 1: Method of test (at ambient temperature).

EN 10002-5, Metallic materials - Tensile testing - Part 5: Method of testing (at elevated temperature).

EN 10020, Definitions and classification of grades of steel.

EN 10021, General technical delivery requirements for steel and iron products.

EN 10045-1, Metallic materials - Charpy impact test - Part 1: Test method.

EN 10052, Vocabulary of heat treatment terms for ferrous products.

EN 10204, Metallic products - Types of inspection documents.

EN 10027-1, Designation systems for steels - Part 1: Steel names, principle symbols.

EN 10027-2, Designation systems for steels Part 2: Numerical systems.

ENV 10220, Seamless and welded steel tubes - Dimensions and masses per unit length

EN 10233, Metallic materials - Tubes - Flattening test.

EN 10234, Metallic materials - Tubes - Drift expanding test.

EN 10236, Metallic materials - Tubes - Ring expanding test.

EN 10237, Metallic materials - Tubes - Ring tensile test.

EN 10246-1, Non-Destructive Testing of steel tubes Part 1: Automatic electromagnetic testing of seamless and welded (except submerged arc welded) ferromagnetic steel tubes for verification of hydraulic leak-tightness.

EN 10246-5, Non-Destructive Testing of steel tubes - Part 5: Automatic full peripheral magnetic transducer/flux leakage testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detection of longitudinal imperfections.

EN 10246-6, Non-Destructive Testing of steel tubes - Part 6: Automatic full peripheral ultrasonic testing of seamless steel tubes for the detection of transverse imperfections.

EN 10246-7, Non-Destructive Testing of steel tubes - Part 7: Automatic full peripheral ultrasonic testing of seamless and welded (except submerged arc welded) steel tubes for the detection of longitudinal imperfections.

6